Abstract:Isospecific propylene polymerization behavior of meta-and para-Lewis base (E) functionalized unbridged zirconocenes ([1-(E n -Ph)-3,4-Me 2 C 5 H 2 ] 2 ZrCl 2 , E = NMe 2 , OMe; n = 1 or 2) was investigated under bulk conditions. Catalytic activity of the zirconocenes, and molecular weight and isotacticity of polypropylenes are found to be dependent on the position and number of the Lewis base functional groups in the zirconocenes. All the crude polypropylenes possess a broad molecular weight distribution and m… Show more
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